Yeats is a thoroughly respected boots-on-the-ground field geologist of the U.S. west coast school, who has matured over a 40 year career into a worldwide assessor of active faults. His first publication listed in Active Faults is dated 1973 and was on the Newport-Inglewood Fault Zone. Yeats brings forth this first-ever worldwide fundamental assessment of the essential, observable characteristics that can be used to indicate the relative threats of single regional seismogenic zones. Yeats' approach is based on first detecting the presence of the active fault (terrestrial or sub-sea) and then rationally rating its seismic threat, as based on its...